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Reports any usages of <b>StringBuffer</b>, <b>StringBuilder</b> or <b>StringJoiner</b>
which can be replaced with a single <b>java.lang.String</b> concatenation. Using a <b>String</b> concatenation
makes the code shorter and simpler. Example:
<pre>
  StringBuilder result = new StringBuilder();
  result.append("i = ");
  result.append(i);
  result.append(";");
  return result.toString();
</pre>
<p>
  This code could be replaced with
</p>
<pre>
  String result = "i = " + i + ";";
  return result;
</pre>
<p>
This inspection only reports when the suggested replacement does not result in significant 
performance drawback on modern JVMs. In many cases the String concatenation may perform better. 
</p>
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